Some people may disagree, but I believe it's a bad idea in general to
invisibly and automatically change port options such as is done by the
DEVELOPER setting in relation to any defined TEST option.
I believe this was intended as a per-port change, but how it is
implemented causes a blanket change for bulk runs. Not only would I
classify it as a POLA violation, but it also causes massive rebuilds
for things like poudriere and synth where the port options do not
match already built packages.
Please consider limiting the invisible DEVELOPER manipulation of
TEST options to non-bulk runs.